I just did a redesign of the ribs so they will support a constant thickness 3/8" flap. That will be a lot easier to manage than a tapered built-up flap system. My spread sheet shows the price of the short kit plus at $104. This includes plans, ribs, tips, flaps, 1/2" fuselage core parts, doublers, motor mounts cheek doubler, stab and elevator frame. The builder needs to supply sheet stock and misc. other parts.
Pat Johnston
Skunk Works